OK ladies and germs this story goes back a long time to just after I got my 38 running. I wanted to put an oil filter on but didn't like the fact that the bypass filters didn't filter most of the oil every trip through the engine. Since the oil distributor valve is just off of the oil pump I reasoned that if I could intercept the oil before it goes through the distributor valve and run it through a filter I could filter much more of the oil, making the filter more effective. I had a friend machine the device you see below. For lack of a better term I'll call it a bypass block. As shown in the pictures it went between the distributor valve and the engine. The oil would enter the bypass block and be directed out of the hole at 3 o'clock to the filter. The oil returning from the filter would enter the block through the hole at 12 o'clock. The oil would then enter the distributor valve and be sent on it's merry way as normal. With this setup in place the engine would show extremely high oil pressure when running, about 45 psi hot. Not knowing a lot about the internal workings of the engine I was concerned I was starving something for oil, causing the high pressure, so I removed the bypass block and to this day it's on a shelf in the garage. I've always wondered if I was running the risk of damaging something by using it or not. My main concern was, was the extra oil pressure causing the squirters to miss the dippers. I don't think so but I'm not sure. The high oil pressure wouldn't damage the mains would it? The limited time I ran it on the engine the valve train was being oiled as I had oil coming out of the rocker holes. Opinions and questions are welcome.
Last edited by Tiny; 12/11/20219:25 PM.
Save a life, adopt a senior shelter pet. The three main causes of blindness: Cataracts, Politics, Religion. Name your dog Naked so you can walk Naked in the park.
Save a life, adopt a senior shelter pet. The three main causes of blindness: Cataracts, Politics, Religion. Name your dog Naked so you can walk Naked in the park.
It's a good thing you removed it. You were at least starving the rocker arms for oil, if not the connecting rod spray tubes. The oil distributor is there to assure that the lower end gets oiled adequately before the rockers get lubricated, requiring at least 15 PSI to the main bearings and spray nozzles before oil goes to the top side. The fact that a 216 pump could indicate as high a pressure as you were getting suggests the entire engine was getting oil-starved and most of the pump volume was trying to force itself through that 1/16" metering hole in the filter canister before getting to either the top or bottom of the engine. There are ways to make a 216 run a full flow filter but it takes a bigger pump and some internal modifications to the oil galleries inside the block. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
It was a full flow filter and remote adapter. I thought the mains and squirters got their oil from a separate passage before the oil arrived at the distributor valve. Am I wrong on that?
Save a life, adopt a senior shelter pet. The three main causes of blindness: Cataracts, Politics, Religion. Name your dog Naked so you can walk Naked in the park.
I've got a 216 block on a stand in the shop right now, but my oxygen hose won't reach that far! As soon as I can, I'll check the oil circuit. I hadn't seen the pics of the filter when I mentioned the canister filter. For a 216 pump to develop that kind of pressure, there had to be a major restriction somewhere, probably upstream of the rod squirt tubes. The squirt tube manifold is in the oil pan, and there's a separate oil nipple that supplies it. The mains and cam bearings get lubed off the oil gallery that runs the length of the block. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
